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Finding the Fourth Proportional to 1,178,482, 1,626,305.16 and 641,938

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Solution

The fourth proportional to 1,178,482, 1,626,305.16 and 641,938 is: 885,874.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178,482 : 1,626,305.16 = 641,938 : x
  2. Step 2: Convert to fraction form
    1,178,482/1,626,305.16 = 641,938/x
  3. Step 3: Cross multiply
    1,178,482x = 1,626,305.16 × 641,938
  4. Step 4: Simplify right side
    1,178,482x = 1,043,987,081,800.08
  5. Step 5: Solve for x
    x = 1,043,987,081,800.08/1,178,482
  6. Step 6: Final answer
    x = 885,874.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.